Abstract : This paper focuses on a confrontation between two modelling démarches led, on the one hand, by psychologists of the interaction and, on the other hand, by computer scientists which are concerned with multiagents systems in the field of distributed artificial intelligence. The researchers are taking an active interest in the question of the interaction, between subjects for the ones, and between agents for the others. The studied processes justify this confrontation as well as the resort, in both cases, to the speech act theory.